If you want it all automatic and hidden, you are gonna have a big chore ahead of you. We had that same boat last year, but with the gravity three system.
The boat prefers weight up front, like 60% front, 40% back. If you put two 750's in the back, you will need at minimum 1250 up front to get a decent wake. For mine last year, I had the stock front sac in the front locker, and put the two stock rear sacs in the walkway stacked on each other and then the twin 750's in the back.
The wake was great, but you really need the wakeboard prop for it to work. I would recommend the 750's in the rear, the stock front locker, one 400 sac (stock rear, you would need to buy) in the walkway, and one triangle sac in the bow (1000) and the wakeboard prop. This would be a kick ass wake with tons of pop. But like I said, if you want 750's in the back, forget about keeping the front weight hidden.